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Kryger [21]
1 year ago
9

4. Explain the difference between (-5)2 and -52.

Mathematics
1 answer:
gtnhenbr [62]1 year ago
6 0
(-5)2 is a multiplication question that equals -10 and -52 is regular number
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What is the value of x?
frez [133]

\left\{\begin{array}{ccc}x+2y=4&\text{multiply both sides by 5}\\4x-5y=42&\text{multiply both sides by 2}\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}5x+10y=20\\8x-10y=84\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad13x=104\qquad\text{divide both sides by 13}\\\\\boxed{x=8}\\\\Answer:\ \boxed{\boxed{x=8}}

5 0
2 years ago
Write 42 as a product of prime numbers<br> 42=?<br> Please help
lisabon 2012 [21]
Hope i help <span>42/2= 21 
21 / 3 = 7 
Answer=2 x 3 x 7</span>
7 0
3 years ago
Read 2 more answers
What is the confidence interval estimate of the population mean percentage change in the price per share of stock during the fir
I am Lyosha [343]

Answer:

(-0.1059 ; - 0.0337)

Step-by-step explanation:

The data table is attached in the picture below:

These is a matched pair design ; which requires taking the difference of the two values for each sample :

The mean and standard deviation of the difference will be used to construct the confidence interval :

The mean of difference, dbar = Σx/n = - 0.0698

The standard deviation of difference, Sd ;

Sd = [√Σ(d - dbar)²/(n-1)] = 0.1054

n = sample size = 25

The confidence interval :

dbar ± [TCritical * Sd/√n]

Tcritical at 90% ; df = n -1 = 25 -1

Tcritical(90% , 24) = 1.1711

C.I = - 0.0698 ± (1.711 * 0.1054/√25)

C.I = - 0.0698 ± 0.0361

C.I = (-0.1059 ; - 0.0337)

5 0
2 years ago
Samuel can type nearly 40 words per minute. Use this information to find the number of hours it would take him to type 2000 word
Sauron [17]
If he types 40 words a minute, he can type 2000 words in 50 minutes you can solve this by doing 40*50 the number of hours would be less than one
8 0
2 years ago
Help please last one
Monica [59]
Y=1/2x+8


Step by step explanation This is how I got the answer to your question and I gave you the solution I hope this helps you out
8 0
1 year ago
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